London authorities said 11 people were injured Saturday after a car drove onto a sidewalk and into a crowd of pedestrians outside of the city's Natural History Museum.

At a time of high tension in the UK capital, the incident is not being treated as terror-related, Metropolitan Police said, calling it a "road trafficinvestigation." A man was detained an currently under arrest.

The London Ambulance Service says it treated 11 patients, "mostly for leg and head injuries," and nine were hospitalized. None of the injuries are believed to be life-threatening.

The incident occurred around 2 p.m. in an area popular with tourists because of a cluster of museums. BBC reporter Chloe Hayward was leaving the Natural History Museum as the incident happened.

"I could see a car diagonally across the road, looking like it was going into one of the boulders on the side of the road, and I could see a crowd of people around what was clearly one or two people on the pavement," she told BBC.

London Metropolitan Police at first said the man had been arrested, but they clarified to say he had been "detained."

Tension are high as the United Kingdom has seen a rash of terror attacks this year, including a car driven by an Islamic terrorist that plowed into a crowd on a bridge and a man who drove a car into people outside of a mosque. Vehicles have been used in a number of attacks throughout Europe in recent years.

The man who was arrested has been released.

Reports on the ground of a car being driven into people outside the Natural History Museum. All media free to use this video. pic.twitter.com/10ePBhqVMF

London authorities said 11 people were injured Saturday after a car drove onto a sidewalk and into a crowd of pedestrians outside of the city's Natural History Museum.

At a time of high tension in the UK capital, the incident is not being treated as terror-related, Metropolitan Police said, calling it a "road trafficinvestigation." A man was detained an currently under arrest.